{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.85-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.19.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  mac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations  ieee80211_chan_bw_change() iterates all stations and accesses link-\u003ereserved.oper via sta-\u003esdata-\u003elink[link_id]. For stations on AP_VLAN interfaces (e.g. 4addr WDS clients), sta-\u003esdata points to the VLAN sdata, whose link never participates in chanctx reservations. This leaves link-\u003ereserved.oper zero-initialized with chan == NULL, causing a NULL pointer dereference in __ieee80211_sta_cap_rx_bw() when accessing chandef-\u003echan-\u003eband during CSA.  Resolve the VLAN sdata to its parent AP sdata using get_bss_sdata() before accessing link data.  [also change sta-\u003esdata in ARRAY_SIZE even if it doesn't matter]",
  "id": "DEBIAN-CVE-2026-31394",
  "modified": "2026-09-14T16:47:50.757672022Z",
  "published": "2026-04-03T16:16:37.597Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-31394"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-31394"
  ]
}